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8.4 Frame Delay
Another approach for packet sorting in multi-camera operation is the so-called Frame
Delay. Due to the fact, that the currently recorded image is stored within the camera and
its transmission starts with a predefined delay, complete images can be transmitted to the
PC at once.
The following figure should serve as an example:
Due to process-related circumstances, the image acquisitions of all cameras end at the
same time. Now the cameras are not trying to transmit their images simultaniously, but –
according to the specified transmission delays – subsequently. Thereby the first camera
starts the transmission immediately – with a transmission delay "0".
8.4.1
Time Saving in Multi-Camera Operation
As previously stated, the Frame delay feature was especially designed for multi-camera
operation with employment of different camera models. Just here an significant accelera
-
tion of the image transmission can be achieved:
For the above mentioned example, the employment of the transmission delay feature re-
sults in a time saving – compared to the approach of using the inter paket gap – of approx.
45% (applied to the transmission of all three images).
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